CN112109665A

CN112109665A - Windshield wiper device

Info

Publication number: CN112109665A
Application number: CN202010547435.3A
Authority: CN
Inventors: 川端悠介; 玛鲁贝·瑞登托二世·班那亚德; 柏捷高·约翰·杰瑞·杜勒加
Original assignee: Meizi Co ltd
Current assignee: Meizi Co ltd; Mitsuba Corp
Priority date: 2019-06-20
Filing date: 2020-06-16
Publication date: 2020-12-22
Also published as: JP7221149B2; JP2021000884A

Abstract

The invention provides a wiper device, which can include a pivot cover with excellent waterproof and drainage performance. The wiper device (5) of the present invention comprises: a first bracket (12), a connecting mechanism (10), and a pivot cover (32). The pivot cover (32) includes: an insertion portion (42) into which the first pivot shaft (6a) is inserted, a body portion (43) formed around the insertion portion (42), and first to third fixing portions (44, 45, 46) fixed to the first bracket (12). The first to third fixing portions (44, 45, 46) have leg portions extending from the body portion (43), and engaging portions provided on the leg portions and sandwiching the first bracket (12).

Description

Windshield wiper device

Technical Field

The present invention relates to a wiper device.

Background

As a wiper device, the following configurations are known: the pivot shaft protrudes from the inside of the vehicle body through the insertion hole, the wiper arm is swung by the pivot shaft, and the front glass is wiped by a wiper blade attached to the wiper arm. The wiper device is attached to the inside of the vehicle body via a bracket, and a crank arm is fixed to the bracket at the front end side of the pivot shaft. The pivot cover is disposed on the front end side of the pivot shaft in a state of being fitted to the pivot shaft with respect to the crank arm, and is fixed to the bracket. The periphery of the pivot shaft is covered with the pivot cover, and rainwater and the like that have entered the vehicle body from the insertion hole are received by the pivot cover and drained (see, for example, patent document 1).

[ Prior art documents ]

[ patent document ]

[ patent document 1] Japanese patent laid-open No. 2014-83993

Disclosure of Invention

[ problems to be solved by the invention ]

However, the crank arm of the wiper device of patent document 1 is fixed to the bracket at the distal end side of the pivot shaft, and the pivot cover is disposed at the distal end side of the pivot shaft with respect to the crank arm. The crank arm slides (rocks) about the pivot shaft. Therefore, the pivot cover must be fixed to the bracket while avoiding the crank arm that slides, and the number of parts to be attached to the bracket is reduced. Therefore, it is difficult to secure the pivot cover in a shape suitable for water resistance and drainage, and there is room for improvement from this viewpoint.

In view of the above, the present invention provides a wiper device including a pivot cover having excellent water resistance and drainage.

[ means for solving problems ]

In order to solve the above problem, a wiper device according to the present invention includes: a first pivot; a bracket rotatably supporting a base end portion of the first pivot shaft; a link mechanism which is disposed closer to a distal end portion side of the first pivot than the bracket and includes a first link arm fixed to the first pivot, a second link arm connected to a driving side of the first link arm, and a third link arm connected to a driven side of the first link arm; and a pivot cover disposed on an opposite side of the bracket from the first link arm and either the second link arm or the third link arm; the pivot cover includes an insertion portion into which the first pivot is inserted, a plate-shaped main body portion formed around the insertion portion, and a plurality of fixing portions provided to protrude from the main body portion and fixed to the bracket, the fixing portions including leg portions extending from the main body portion in a direction from a tip end portion toward a base end portion of the first pivot, and engaging portions provided at one ends of the leg portions and sandwiching the bracket from an axial direction of the first pivot.

In the wiper device according to the present invention, the second link arm and the third link arm are disposed so that the longitudinal direction thereof extends along the horizontal direction, the second link arm is located below the third link arm in the direction of gravity, and the pivot cover is disposed on the opposite side of the bracket from the first link arm and the second link arm.

In the wiper device of the present invention, there are included: an electric motor that imparts a rotational force to the first pivot via the connection mechanism; and a first wiper arm and a second wiper arm fixed to front end portions of the first pivot shaft and the second pivot shaft; the connecting mechanism includes: a fourth connecting arm that connects the electric motor to the second connecting arm; and a fifth link arm connecting the second pivot to the third link arm.

In the wiper device according to the present invention, wherein the third link arm is disposed so that a longitudinal direction thereof is along a horizontal direction, the pivot cover includes: a first drain portion provided on the opposite side of the first pivot shaft with respect to the second link arm in a horizontal direction intersecting with a longitudinal direction of the third link arm; and a second drain portion provided between the second connecting arm and the third connecting arm in a horizontal direction intersecting with a longitudinal direction of the third connecting arm.

In the wiper device according to the present invention, the electric motor is disposed between the first pivot shaft and the second pivot shaft in a longitudinal direction of the third link arm, and the pivot cover includes: a first drain portion provided at an end opposite to the third link arm with respect to the first pivot in the body portion; and a second drain portion provided at an end portion on the third link arm side, that is, an end portion on the electric motor side with respect to the first pivot shaft in the body portion.

In the wiper device according to the present invention, the pivot cover has a hole portion in the vicinity of a connecting portion between the fixed portion and the main body portion, and the bracket has a protruding portion that engages with the hole portion.

In the wiper device of the present invention, a cover member attached to the first link arm is further included.

In the wiper device of the present invention, wherein the cover member has: an upper surface portion that covers a surface of the first link arm that faces a front end portion side of the first pivot shaft; a mounting portion provided on the upper surface portion, into which the first pivot is inserted; a pair of side wall portions protruding from both sides in the width direction of the upper surface portion; and a locking part provided at an end of the side wall part and locked to the first connecting arm.

In the wiper device according to the present invention, the cover member has a wall portion protruding from the upper surface portion toward a front end portion of the first pivot shaft at an end portion on a lower side in a gravitational direction in a longitudinal direction of the first link arm.

In the wiper device of the present invention, there is further provided a lever cover mounted on the second connecting arm, the lever cover having: a covering portion that covers an entire surface of a surface of the second link arm facing the distal end portion side of the first pivot shaft; a pair of side coating parts protruding from both sides of the coating part in the width direction; and a locking portion provided at an end of the side surface coating portion and locked to the second connecting arm.

In the wiper device of the present invention, wherein the insertion portion is inserted by the first pivot shaft without contact.

[ Effect of the invention ]

According to the present invention, a plurality of fixing portions are included in a pivot cover having an insertion portion into which the first pivot shaft is inserted. Thus, the wiper device can include the pivot cover having excellent water resistance and drainage.

Drawings

Fig. 1 is a front view showing a vehicle including a wiper device according to an embodiment of the present invention.

Fig. 2 is a perspective view showing the wiper device in the embodiment.

Fig. 3 is an exploded perspective view showing the wiper device according to the embodiment.

Fig. 4 is a perspective view showing a pivot cover in the embodiment.

Fig. 5 is a perspective view showing a state in which the pivot cover in the embodiment is viewed from below.

Fig. 6 is a perspective view showing a state where the first bracket is removed from the pivot cover in the embodiment and is viewed from below.

Fig. 7 is a plan view showing a cover member and a lever cover in the embodiment.

Fig. 8 is a perspective view showing a state in which the cover member and the lever cover in the embodiment are viewed from below.

Fig. 9 is a cross-sectional view along line IX-IX of fig. 7 in an embodiment.

Fig. 10 is a cross-sectional view taken along line X-X of fig. 7 in an embodiment.

[ description of symbols ]

1: vehicle with a steering wheel

4a, 4 b: first and second wiper arms

5: windshield wiper device

6a, 6 b: first pivot, second pivot

6a1, 6b 1: front end part

6a2, 6b 2: basal end part

10: connecting mechanism

12: first bracket (bracket)

18: convex part

22: electric motor

25: first crank arm (fourth connecting arm)

26: first connecting rod (second connecting arm)

26 c: upper surface (surface of the second link arm facing the front end side of the first pivot)

27: second crank arm (first connecting arm)

27 a: one end of the second crank arm

27 d: upper surface (surface of the first link arm facing the front end side of the first pivot)

28: third crank arm (fifth connecting arm)

29: second connecting rod (third connecting arm)

32: pivot cover

33: cover member

33 a: upper surface part

33 b: mounting part

33 c: a pair of side wall parts

33 d: stop part

33 e: wall part

33 i: end of cover member (end of one end side of second crank arm)

34: rod cover

34 a: coating part

34 b: a pair of side coating parts

34 c: stop part

42: insertion part

43: body part

44: first fixed part (multiple fixed parts)

45: second fixed part (multiple fixed parts)

46: third fixed part (multiple fixed parts)

47: a first water discharging part

48: second water discharge part

49: positioning hole part (hole part)

53. 57 and 62: foot part

54. 58, 63: engaging part

66: connecting part

Detailed Description

Next, a wiper device according to an embodiment of the present invention will be described with reference to the drawings.

(vehicle)

Fig. 1 is a front view showing a vehicle 1 including a wiper device 5. In the following description, the vertical direction of gravity may be simply referred to as an upward direction and a downward direction, and a direction perpendicular to the direction of gravity may be referred to as a horizontal direction.

As shown in fig. 1, the vehicle 1 is provided with a first wiper blade 3a and a second wiper blade 3b for wiping the front glass 2.

The first wiper blade 3a is attached to the front end of the first wiper arm 4 a. The first wiper blade 3a is urged toward the front glass 2 side by a spring, not shown, built in the first wiper arm 4 a. The second wiper blade 3b is attached to the front end of the second wiper arm 4 b. The second wiper blade 3b is biased toward the front glass 2 by a spring, not shown, built into the second wiper arm 4 b.

A wiper device 5 is provided inside the vehicle 1 to drive the

wiper arms

4a and 4b to perform a wiping operation. The wiping mode of the wiper device 5 is a so-called tandem type in which the

pivot shafts

6a and 6b supporting the

wiper arms

4a and 4b are disposed on the vehicle width direction driver seat side of the front glass 2 and substantially in the center in the vehicle width direction. The

wiper arms

4a and 4b are driven by the wiper device 5 and swing in the same direction between the upper and lower reversing positions to wipe the front glass 2.

(wiper device)

Fig. 2 is a perspective view showing the wiper device 5.

As shown in fig. 1 and 2, the wiper device 5 includes: a wiper motor 8, an output shaft 9, a connecting mechanism 10, a first pivot shaft 6a and a second pivot shaft 6b, a first wiper arm 4a and a second wiper arm 4b, and a first bracket (bracket) 12 and a second bracket 13.

The first bracket 12 and the second bracket 13 of the wiper device 5 are connected by a pipe frame 15. The first bracket 12 and the second bracket 13 are attached to the vehicle 1, whereby the wiper device 5 is fixed inside the vehicle 1.

The base end portion 6a2 of the first pivot shaft 6a is rotatably supported by the support portion 17 (see fig. 5) of the first bracket 12. The first bracket 12 has a projection 18 (see also fig. 3) that engages with a positioning hole 49 (described later) of the pivot cover 32. The convex portion 18 of the first bracket 12 will be described later.

Further, the support portion 19 of the second bracket 13 rotatably supports the base end portion 6b2 of the second pivot shaft 6 b.

The first pivot shaft 6a is disposed at the vehicle width direction outer side below the front glass 2. The second pivot shaft 6b is disposed substantially at the center in the vehicle width direction below the front glass 2. A base end of the first wiper arm 4a is fixed to a tip end portion 6a1 of the first pivot shaft 6 a. Further, a base end of the second wiper arm 4b is fixed to the distal end portion 6b1 of the second pivot shaft 6 b.

The first pivot shaft 6a and the second pivot shaft 6b are connected to each other by a connection mechanism 10 so as to be synchronously rotatable. The connection mechanism 10 is connected to the wiper motor 8 via the output shaft 9. The output shaft 9 is rotatably supported by the first carrier 12. A wiper motor 8 is connected to the output shaft 9. The wiper motor 8 includes: a speed reducer 23 attached to the first bracket 12 and connected to the output shaft 9, and an electric motor 22 connected to the speed reducer 23. The wiper motor 8 is disposed between the first pivot shaft 6a and the second pivot shaft 6b in the longitudinal direction of a second link connecting rod 29 (described later). The wiper motor 8 transmits the rotation of the electric motor 22 to the output shaft 9 via the speed reducer 23. The rotation of the output shaft 9 is converted into a rocking motion by the connecting mechanism 10. That is, the wiper motor 8 rotates the first pivot shaft 6a and the second pivot shaft 6b forward and backward via the link mechanism 10.

(connecting mechanism)

Fig. 3 is an exploded perspective view showing the wiper device 5.

As shown in fig. 2 and 3, the connection mechanism 10 includes: a first crank arm (fourth connecting arm) 25, a first link (second connecting arm) 26, a second crank arm (first connecting arm) 27, a third crank arm (fifth connecting arm) 28, a second link (third connecting arm) 29, a pivot cover 32, a cover member 33, and a lever cover 34.

The first crank arm 25 has a base end fixed to the output shaft 9 and a tip end swingably coupled to one end 26a of the first link 26 via a first ball joint 36. That is, the wiper motor 8 is coupled to the first link 26 via the first crank arm 25, the output shaft 9, and the like.

That is, the other end 26b of the first link 26 is swingably coupled to the one end 27a of the second crank arm 27 via the second ball joint 37. That is, the one end 27a of the second crank arm 27 becomes the driving side that transmits the rotation of the wiper motor 8.

The intermediate portion 27b of the second crank arm 27 is fixed to the base end portion 6a2 of the first pivot shaft 6 a. The other end 27c of the second crank arm 27 is swingably coupled to the one end 29a of the second link 29 via a third ball joint 38. That is, the other end 27c of the second crank arm 27 becomes the driven side to which the rotation of the wiper motor 8 is transmitted.

In this way, the first link 26 is coupled to the second crank arm 27 at one end 27a, and the second link 29 is coupled to the other end 27 c. Further, the base end portion 6a2 of the first pivot shaft 6a is fixed to the intermediate portion 27b between the one end 27a and the other end 27c of the second crank arm 27.

The other end 29b of the second link 29 is swingably coupled to the front end of the third crank arm 28 via a fourth ball joint 39. The second link 29 is disposed so that its longitudinal direction extends in the vehicle width direction and along a horizontal direction intersecting the gravitational direction. The first link 26 is disposed so that its longitudinal direction extends parallel to the longitudinal direction of the second link 29 and extends along the horizontal direction. Specifically, the first link 26 is disposed in the vehicle body front side of the second link 29 and below the second link 29.

The base end of the third crank arm 28 is fixed to the base end portion 6b2 of the second pivot shaft 6 b. That is, the second link 29 is coupled to the second pivot shaft 6b via the third crank arm 28.

(operation of wiper device)

Next, the operation of the wiper device 5 will be described.

By the operation of the electric motor 22 of the wiper motor 8, the rotation of the electric motor 22 is output from the output shaft 9 via the speed reducer 23. The rotation of the output shaft 9 is transmitted to the first crank arm, and the first crank arm 25 rocks. By the first crank arm 25 swinging, one end 27a of the second crank arm 27 runs via the first link 26, and the second crank arm 27 rotates with the first pivot shaft 6a as an axis.

The first pivot shaft 6a rotates by the rotation of the second crank arm 27. The first wiper arm 4a (see fig. 1) attached to the distal end portion 6a1 of the first pivot shaft 6a performs a swinging motion within a predetermined range integrally with the first pivot shaft 6a by the first pivot shaft 6a rotating.

The second crank arm 27 fixed to the first pivot shaft 6a and the third crank arm 28 fixed to the second pivot shaft 6b are coupled via a second link 29 and the like. Therefore, the second crank arm 27 rotates, and the third crank arm 28 rocks. The second pivot shaft 6b rotates by the third crank arm 28 swinging.

As a result, as shown in fig. 1, the second wiper arm 4b attached to the distal end portion 6b1 of the second pivot shaft 6b also performs a swinging motion within a predetermined range in synchronization with the first wiper arm 4 a. The first wiper blade 3a and the second wiper blade 3b wipe the front glass 2 by the swinging motion of the first wiper arm 4a and the second wiper arm 4 b.

(Pivot cover)

Fig. 4 is a perspective view showing the pivot cover 32. Fig. 5 is a perspective view showing the pivot cover 32 as viewed from below. Fig. 6 is a perspective view showing a state where the first bracket 12 is removed from the pivot cover 32 and then viewed from below.

As shown in fig. 4 to 6, the pivot cover 32 is disposed on the opposite side (i.e., above) of the first bracket 12 from the second crank arm 27 and the first link 26. The pivot cover 32 is fixed to the first bracket 12 positioned below the second crank arm 27 and the first link 26 in a state of being disposed above the second crank arm 27 and the first link 26.

The pivot cover 32 has: the insertion portion 42, the main body portion 43, the plurality of fixing

portions

44, 45, 46, the first drain portion 47, the second drain portion 48, the positioning hole portion (hole portion) 49, and the lid peripheral wall 51.

The body portion 43 is formed in a plate shape and is disposed substantially horizontally above the second crank arm 27 and the first link 26. The insertion portion 42 is formed inside the body portion 43. In other words, the plate-shaped body portion 43 is formed around the insertion portion 42.

The insertion portion 42 is formed in a ring shape penetrating in a direction orthogonal to the surface of the main body portion 43, and rises upward from the surface of the main body portion 43 along the first pivot shaft 6 a. The first pivot shaft 6a is inserted into the insertion portion 42 from below without contact, and protrudes upward from the surface of the body portion 43.

By inserting the first pivot shaft 6a into the insertion portion 42 in a non-contact manner, sliding resistance can be suppressed to be small when the first pivot shaft 6a rotates, and sliding efficiency of the first pivot shaft 6a can be improved.

The main body 43 is provided with a plurality of fixing

portions

44, 45, 46. The plurality of fixing

portions

44, 45, 46 are exemplified by, for example, a first fixing portion 44, a second fixing portion 45, and a third fixing portion 46, but not limited thereto.

The first fixing portion 44 is formed at an end 43b on one side in the longitudinal direction of the second link 29, in a first end 43a of the main body portion 43 where the insertion portion 42 is provided. The end 43b of the main body 43 is an end on the output shaft 9 side with respect to the first pivot shaft 6 a. Further, the one end portion 43b is positioned in a space between the second link 29 and the first link 26 in a horizontal direction intersecting the longitudinal direction of the second link 29.

The second fixing portion 45 is formed at the other end 43c in the longitudinal direction of the second link 29 in the first end 43 a. The other end 43c of the main body 43 is an end opposite to the output shaft 9 with respect to the first pivot shaft 6 a. The other end portion 43c is located in a space in the vicinity of the middle portion 27b of the second crank arm 27.

The third fixing portion 46 is formed at the second end portion 43d in the body portion 43. The second end 43d is located on the opposite side of the first end 43a with respect to the first pivot 6a and beyond the first link 26 in the horizontal direction intersecting the longitudinal direction of the second link 29. Further, the second end portion 43d is located in a space in the vicinity of the first link 26.

The first fixing portion 44, the second fixing portion 45, and the third fixing portion 46 are located in a space near the first pivot shaft 6a around the first pivot shaft 6 a.

The first fixing portion 44 has a leg portion 53 and an engaging portion 54.

The leg 53 extends from the main body 43 in a direction from the distal end 6b1 of the second pivot shaft 6b toward the proximal end 6b2 (i.e., downward).

The engaging portion 54 is provided at one end (lower end) of the leg portion 53 and protrudes in a direction of contacting the rear surface of the first bracket 12. The surface of the first bracket 12 is in contact with the abutment portion 55. The contact portion 55 is formed in the leg portion 53 at a position on the front surface side of the first bracket 12. Therefore, the front surface of the first bracket 12 contacts the contact portion 55, and the rear surface of the first bracket 12 contacts the engagement portion 54. Thereby, the first bracket 12 is sandwiched by the contact portion 55 and the engagement portion 54 from the axial direction of the first pivot shaft 6 a. That is, the first fixing portion 44 is fixed to the first bracket 12.

The second fixing portion 45 has a leg portion 57, an engaging portion 58, and an abutting portion 59. Similarly to the first fixing portion 44, the second fixing portion 45 sandwiches the first bracket 12 from the axial direction of the first pivot shaft 6a by the contact portion 59 and the engaging portion 58. That is, the second fixing portion 45 is fixed to the first bracket 12.

The third fixing portion 46 has a leg portion 62, an engaging portion 63, and an abutting portion 64. Similarly to the first fixing portion 44, the third fixing portion 46 is configured such that the first bracket 12 is held from the axial direction of the first pivot shaft 6a by the contact portion 64 and the engaging portion 63. That is, the third fixing portion 46 is fixed to the first bracket 12.

The three fixing portions, i.e., the first fixing portion 44, the second fixing portion 45, and the third fixing portion 46, are fixed to the first bracket 12 around the first pivot shaft 6a in a state of being positioned in a space near the first pivot shaft 6 a. Therefore, the pivot cover 32 is held in a stable state in a state where the body portion 43 is disposed above the second crank arm 27 and the first link 26.

That is, in a state where the second crank arm 27 and the first link 26 are interposed between the first bracket 12 and the pivot cover 32, the pivot cover 32 can be stably fixed to the first bracket 12 by the fixing

portions

44, 45, and 46.

Thereby, the pivot cover 32 can be formed in a large shape in the horizontal direction.

The waterproof and drainage properties of the pivot cover 32 will be described below.

At the edge of the main body 43, the cover peripheral wall 51 is erected upward so as to be orthogonal to the main body 43. The main body 43 is provided with a first drain portion 47 and a second drain portion 48 (see also fig. 2).

First drain portion 47 is provided at second end portion 43d on the opposite side of second link 29 with respect to first pivot shaft 6a in main body portion 43. In other words, first water drainage unit 47 is provided at second end 43d opposite to first pivot shaft 6a with respect to first link 26 in the horizontal direction intersecting the longitudinal direction of second link 29. The first water drainage portion 47 is formed in a U-shaped cross section by the bottom portion 47a and the cover peripheral walls 51 on both sides, and opens to the opposite side of the first pivot shaft 6 a. The bottom portion 47a is formed to be downslope toward the opening of the first drain portion 47.

The second drain portion 48 is provided at a position closer to the insertion portion 42 than the first fixing portion 44 in the end portion 43b on one side in the longitudinal direction of the second link 29. In other words, the second drain portion 48 is provided by a space (so-called dead space) between the second link 29 and the first link 26 in a horizontal direction intersecting with the longitudinal direction of the second link 29. The second drain portion 48 is formed in a U-shaped cross section and opens toward the second link 29.

The second drain portion 48 is provided by utilizing the space between the second link 29 and the first link 26, without providing the second drain portion 48 on the second fixing portion 45 side, for example. Therefore, the pivot cover 32 can be simply formed without greatly extending the pivot cover 32 toward the second fixing portion 45 side. This can improve the degree of freedom in layout when the wiper device 5 is installed in the space of the vehicle 1.

Here, in a state where the wiper device 5 has been mounted on the vehicle 1, the first end portion 43a of the pivot cover 32 is disposed further above than the second end portion 43 d. Therefore, the rainwater and the like dropped on the pivot cover 32 flow toward the second end 43d side than the first end 43 a. Therefore, the first drain portion 47 is formed large relative to the second drain portion 48. This allows rainwater and the like dripping on the pivot cover 32 to be appropriately discharged from the first water discharge unit 47.

Here, it is conceivable that, during traveling of the vehicle 1, rainwater or the like dripping on the pivot cover 32 flows toward the first end portion 43a side, for example. Therefore, the second drain portion 48 is provided at a position closer to the insertion portion 42 than the first fixing portion 44 in the end portion 43b on the first end portion 43a side. Therefore, rainwater and the like flowing toward the first end portion 43a can be appropriately discharged from the second drain portion 48.

The lid peripheral wall 51 rises at the first end 43 a. Therefore, rainwater or the like flowing toward the first end portion 43a can be suppressed from dropping from the first end portion 43 a.

Thus, by providing the two drain portions, i.e., the first drain portion 47 and the second drain portion 48, in the pivot cover 32, rainwater or the like entering from the vicinity of the first pivot shaft 6a can be drained to the lower side of the vehicle 1 or a position away from the second crank arm 27.

The insertion portion 42 stands on the first end portion 43 a. Therefore, rainwater and the like flowing toward the first end portion 43a can be suppressed from dropping from the insertion portion 42.

In addition, a positioning hole portion 49 is formed in the main body portion 43 of the pivot cover 32. The positioning hole portion 49 is formed in the vicinity of the connecting portion 66. The connection portion 66 is a portion connecting the first fixing portion 44 and the main body portion 43. That is, the positioning hole portion 49 is provided in the vicinity of the first fixing portion 44.

The positioning hole 49 engages with the convex portion 18 (see fig. 2 and 3) of the first bracket 12. The pivot cover 32 can be positioned with respect to the first bracket 12 by engaging the positioning hole 49 with the convex portion 18 of the first bracket 12.

In particular, by providing the positioning hole portion 49 in the vicinity of the first fixing portion 44, the first fixing portion 44 can be easily positioned on the first bracket 12.

Here, as shown in fig. 2 and 3, the first bracket 12, the link mechanism 10, and the main body portion 43 of the pivot cover 32 are arranged in this order from the base end portion 6a2 of the first pivot shaft 6a toward the front end portion 6a 1. Specifically, the first bracket 12, the second crank arm 27, the first link 26, and the pivot cover 32 are arranged in this order from the base end portion 6a2 of the first pivot shaft 6a toward the front end portion 6a 1.

In this state, three positions of the first fixing portion 44, the second fixing portion 45, and the third fixing portion 46 of the pivot cover 32 are fixed to the first bracket 12. Therefore, the pivot cover 32 is held in a stable state in a state where the body portion 43 is disposed above the second crank arm 27 and the first link 26.

portions

44, 45, and 46.

Thereby, the pivot cover 32 can be formed in a large shape in the horizontal direction. This improves the water-proof and water-draining properties of the pivot cover 32, and the pivot cover 32 is a member having excellent water-proof and water-draining properties.

(cover member)

As shown in fig. 3 and 6, the second crank arm 27 has, for example, an upper surface 27d, both side surfaces 27e, and a lower surface 27 f. Both sides in the width direction of the upper surface 27d and both sides in the width direction of the lower surface 27f are connected by both side surfaces 27 e. The upper surface 27d is a surface of the second crank arm 27 that faces the front end portion 6a1 side of the first pivot shaft 6 a.

The second crank arm 27 is formed, for example, in a rectangular shape in cross section by the upper surface 27d, the side surfaces 27e, and the lower surface 27 f. A cover member 33 is attached to the intermediate portion 27b of the second crank arm 27.

Fig. 7 is a plan view showing the cover member 33 and the lever cover 34. Fig. 8 is a perspective view showing the cap member 33 and the lever cap 34 when viewed from below. Fig. 9 is a sectional view taken along line IX-IX of fig. 7.

As shown in fig. 7 to 9, the cover member 33 includes: an upper surface portion 33a, a mounting portion 33b, a pair of side wall portions 33c, a plurality of locking portions 33d, and a wall portion 33 e.

The upper surface portion 33a covers the upper surface 27d of the intermediate portion 27b in the second crank arm 27. The mounting portion 33b is formed annularly on the upper surface portion 33a, and penetrates in the extending direction of the first pivot shaft 6 a. The mounting portion 33b is fitted to the first pivot shaft 6a protruding from the upper surface 27 d. In this state, the mounting portion 33b and the first pivot shaft 6a are kept in a closed state.

The pair of side wall portions 33c extend downward along the side surfaces 27e from both sides in the width direction of the upper surface portion 33 a. The lower side wall portions 33f of the pair of side wall portions 33c project downward from the lower surface 27f of the second crank arm 27. The plurality of locking portions 33d are provided at the ends (specifically, the lower side wall portion 33f) of the pair of side wall portions 33c and are locked to the lower surface 27f of the second crank arm 27.

For example, the plurality of locking portions 33d are locked to the lower surface 27f of the second crank arm 27 by elastically deforming the pair of side wall portions 33 c. Thereby, the cover member 33 is fixed to the intermediate portion 27b of the second crank arm 27.

In a state where the cover member 33 is fixed to the intermediate portion 27b of the second crank arm 27, the mounting portion 33b and the first pivot shaft 6a are held in a closed state. The cover member 33 is disposed below the gap between the insertion portion 42 of the pivot cover 32 and the first pivot shaft 6a (see fig. 4).

Therefore, for example, when rainwater or the like drips from the gap between the insertion portion 42 of the pivot cover 32 and the first pivot shaft 6a, the dripped rainwater or the like can be received by the cover member 33. Rainwater and the like received by the cover member 33 can be appropriately discharged from the lower side wall portion 33f through the pair of side wall portions 33c from the upper surface portion 33 a. Thus, the cover member 33 can prevent rainwater or the like dripping from the insertion portion 42 from being covered with water.

Further, a gap between the insertion portion 42 of the pivot cover 32 and the first pivot shaft 6a may be closed by an oil seal.

The upper surface portion 33a and the pair of side wall portions 33c have wall portions 33 e. Here, the second link 29 is disposed above the first link 26. Thus, one end 27a of the second crank arm 27 is located further below than the other end 27 c. Therefore, the wall portion 33e is formed at the end portion 33i of the second crank arm 27 on the one end 27a side. That is, the wall portion 33e is provided on the lower side in the gravity direction in the longitudinal direction of the second crank arm 27.

The wall portion 33e has a first wall portion 33g and a pair of second wall portions 33 h. The first wall portion 33g protrudes from the upper surface portion 33a toward the tip end portion 6a1 side of the first pivot shaft 6 a. The pair of second wall portions 33h protrude horizontally from the pair of side wall portions 33 c.

By forming the wall portion 33e in the cover member 33, it is possible to suppress water droplets that have adhered to the cover member 33 from flowing toward the one end 27a side of the second crank arm 27, for example, along the upper surface portion 33a of the cover member 33.

Further, the cover member 33 may be provided to the second link 29.

(rod cap)

As shown in fig. 3, the first link 26 is disposed at a position where one end 26a side or the other end 26b side is separated from the pivot cover 32 in the vertical direction during the sliding of the link mechanism 10. That is, the first ball joint 36 side of the one end 26a or the second ball joint 37 side of the other end 26b is disposed at a position separated from the pivot cover 32 in the vertical direction. It is necessary to suppress the intrusion of rainwater or the like into the first ball joint 36 or the second ball joint 37. Therefore, the lever cover 34 is mounted on the first link 26 from above.

Fig. 10 is a cross-sectional view taken along line X-X of fig. 7.

As shown in fig. 7, 8, and 10, the first link 26 has, for example, an upper surface 26c, two side surfaces 26d, and a lower surface 26 e. The upper surface 26c is a surface of the first link 26 that faces the front end portion 6a1 side of the first pivot shaft 6 a.

Both widthwise edges of the upper surface 26c and both widthwise edges of the lower surface 26e are connected by both side surfaces 26 d. The first link 26 is formed in a rectangular shape in cross section by the upper surface 26c, the side surfaces 26d, and the lower surface 26 e.

The lever cover 34 has: a covering 34a, a pair of side covering 34b, a plurality of locking portions 34c, a brim 34d, and a plurality of positioning pins 34 e. The covering portion 34a covers the entire upper surface 26c of the first link 26. The pair of side surface covering portions 34b protrude downward from both sides in the width direction of the covering portion 34 a. The pair of side surface coating portions 34b are disposed along the both side surfaces 26d of the first link 26 so as to cover the both side surfaces 26 d.

The eaves 34d extend horizontally from the pair of side covers 34b at a portion corresponding to the second ball joint 37 in the pair of side covers 34 b.

The plurality of locking portions 34c are provided at the lower end portions (end portions) of the pair of side surface covering portions 34 b. The plurality of locking portions 34c are locked to the lower surface 26e of the first link 26. In this state, the plurality of positioning pins 34e are inserted into the positioning holes 26f of the first link 26.

The plurality of locking portions 34c are locked to the lower surface 26e of the first link 26 in a state where the plurality of positioning pins 34e are inserted into the positioning holes 26f and positioned. In this state, the entire longitudinal region of the first link 26 is covered from above by the link cover 34.

As shown in fig. 3 and 7, the first link 26 is disposed at a position separated from the pivot cover 32 in the vertical direction on the first ball joint 36 side of the one end 26a or the second ball joint 37 side of the other end 26b during sliding of the link mechanism 10.

The entire area in the longitudinal direction of the first link 26 is covered from above by the lever cover 34, whereby the first ball joint 36 or the second ball joint 37 is covered by the lever cover 34.

Thus, the rainwater or the like that has dropped to the first link 26 side can be suppressed from entering the first ball joint 36 or the second ball joint 37 in a circuitous manner by the lever cover 34.

Further, the pair of eaves 34d are provided at positions corresponding to the second ball joints 37. This makes it possible to more favorably suppress rainwater or the like dripping to the first link 26 side from entering the second ball joint 37 in a winding manner by the pair of eaves 34 d.

The present invention is not limited to the above-described embodiments, and various modifications may be made to the above-described embodiments without departing from the spirit of the present invention.

Claims

1. A wiper device, comprising:

a first pivot;

a bracket that rotatably supports a base end portion of the first pivot shaft;

a link mechanism which is disposed closer to a distal end portion side of the first pivot than the bracket and includes a first link arm fixed to the first pivot, a second link arm connected to a driving side of the first link arm, and a third link arm connected to a driven side of the first link arm; and

a pivot cover disposed on an opposite side of the bracket from the first link arm and one of the second link arm and the third link arm;

the pivot cover includes an insertion portion into which the first pivot is inserted, a plate-shaped main body portion formed around the insertion portion, and a plurality of fixing portions provided to protrude from the main body portion and fixed to the bracket,

the fixing portion includes a leg portion extending from the main body portion in a direction from a distal end portion of the first pivot toward a proximal end portion thereof, and an engaging portion provided at one end of the leg portion and sandwiching the bracket from an axial direction of the first pivot.

2. The wiper device according to claim 1,

the second link arm and the third link arm are arranged so that a longitudinal direction thereof is along a horizontal direction, the second link arm is located below the third link arm in a gravitational direction,

the pivot cover is disposed on the opposite side of the bracket from the first connecting arm and the second connecting arm.

3. The wiper device according to claim 1 or 2, comprising:

an electric motor that imparts a rotational force to the first pivot via the connection mechanism; and

a first wiper arm and a second wiper arm fixed to front end portions of the first pivot shaft and the second pivot shaft;

the connecting mechanism includes:

a fourth connecting arm that connects the electric motor to the second connecting arm; and

and a fifth link arm connecting the second pivot to the third link arm.

4. The wiper device according to claim 1 or 2,

the third connecting arm is arranged such that the longitudinal direction thereof is along the horizontal direction,

the pivot cover includes:

a first drain portion provided on the opposite side of the first pivot shaft with respect to the second link arm in a horizontal direction intersecting with a longitudinal direction of the third link arm; and

and a second drain portion provided between the second connecting arm and the third connecting arm in a horizontal direction intersecting with a longitudinal direction of the third connecting arm.

5. The wiper device according to claim 3,

the electric motor is disposed between the first pivot shaft and the second pivot shaft in a longitudinal direction of the third link arm,

the pivot cover includes:

a first drain portion provided at an end opposite to the third link arm with respect to the first pivot in the body portion; and a second drain portion provided at an end portion on the third link arm side, that is, an end portion on the electric motor side with respect to the first pivot shaft in the body portion.

6. The wiper device according to claim 1 or 2,

the pivot cover has a hole portion in the vicinity of a connection portion between the fixed portion and the main body portion,

the bracket has a convex portion engaged with the hole portion.

7. The wiper device according to claim 1 or 2,

also included is a cover member mounted to the first link arm.

8. The wiper device according to claim 7,

the cover member has:

an upper surface portion that covers a surface of the first link arm that faces a front end portion side of the first pivot shaft;

a mounting portion provided on the upper surface portion, into which the first pivot is inserted;

a pair of side wall portions protruding from both sides in the width direction of the upper surface portion; and

and a locking part provided at an end of the side wall part and locked to the first connecting arm.

9. The wiper device according to claim 8,

the cover member has a wall portion protruding from the upper surface portion toward a tip end portion of the first pivot shaft at an end portion on a lower side in a gravitational direction in a longitudinal direction of the first link arm.

10. The wiper device according to claim 1 or 2,

further comprising a lever cover mounted on said second connecting arm,

the lever cover has:

a covering portion that covers an entire surface of a surface of the second link arm facing the distal end portion side of the first pivot shaft;

a pair of side coating parts protruding from both sides of the coating part in the width direction; and

and a locking part which is arranged at the end part of the side surface coating part and is locked at the second connecting arm.

11. The wiper device according to claim 1 or 2,

the insertion portion is inserted by the first pivot shaft in a non-contact manner.